You can use existing measures to create a new calculated
measure in your report.
For example, you could show estimated profits by
creating a calculated measure that shows revised contract minus estimated cost.
Right click on the column header for an existing
measure in your report and select User Defined Measure > Create Calculated Measure....
In the Create a Calculated Measure
dialog box, in the Display Name field, enter a name for
the new measure.
Determine the format and decimal places, and
then select from the list of existing measures and available mathematical symbols
to create the new measure.
(Optional) Select Subtotal Calculation if you want the
subtotals to be computed by computing the result of the formula with the base
number's subtotals. When this check box is clear, the subtotals are computed as
a summary of the calculated number's different values. For more details on
subtotal calculations, see About Subtotal Calculation in Calculated Measures.